Carbureter.



E. A. RiOTT -l.

GARBURBTER. APPLICATION FILED JAN.16. 1912. f

Patented Sept. 30, 1913.

2 SHEETS-SHEET 2.

EUGENE e. RIOTTE,G1"'BROFXVHJLE, iiEW' iE-QBK. ASSIGNOR'TO STANIUARD meme CONSTRUCTION-COMPANY, e13 .YERSEEZ NEW JERSEY;

ITYiNEW JERSEY, A CORPORATION OF CARBUEETER.

Lemme.

Specificatio'n sf matters P terif- Tee-meme @eptfifi 1M3 e iicetmreiea tummy-mg 191m em-me. eme ss range'ci to held iiquici'fiiei; ifhi'eh admiftd 55 represent a plurality of epen endedsprayer tips at' the upper endsei pipes "Whiehle'addowii mm m ne casing 1 s0 me their? lowei ems WilPbe immeise'd in the liqiiitl fuel ther'einL 6 re resent a tube ceimeeied w the upper iii'anuaily controllable threttle valve danipe'WT: The ceiietit'ets fife-feed pipe and leads't'o themetor. The pipe and"ecreiv"iiitwpipe g Whei'eb y' \vhe'ii Skid ecrefiv'ii is leesei'ied,"flie reguietingfileewe 35- 16, 01' eithei" of flgem inay be adjusted properljyfl eftez whichthe screw 17 may be :ig-hte'nedep t0 hold. the same against dis 'f'plae'emeiit 'iThis efio'rds iner'ely one cenvenient fnedfiisfier veryingthe size 01 theinilets in f'ioiit' 0f the iips 5. In p'ra'etice, when the siZe Gf fheee inietipzissagesi iiisbeen properly fixed for an engine of 'a certain size, 251') fi'irthe'f mu -meme is'reqiiired. 1 The s] ee've 8" constitutes f'i'n effect" in automatic velve foi centreHiflg'theTiiimbei' of :15. ed "missiion passages that me 613611 "at any' given time, and 'ziecdr'flviiigly-the number ofspre yeitips 5"izhai; are :1'e'n(ilei'ed effective, because if that' fuei'willbe drawn fi'em'the sprayer "ups 11m) Hie eerb'ui'etiiig'ehafr'ibei adpicen'i',

and awe the piston =9. Thisduc't 11 is clergipi gfseirew 15?, WhICh' HIZLy pass'threng'h h neonem elete in thefiaid sleeves -15-16 to arid zbdve' seicmips and With'ih the ivfore- V of diiferentq engthe, "'t1iese"being best seen ie have et least one of sa idfiozissf ges-partiy' duces. throne-h the assume 11b .1 l a J ing vacuum. in the space 12 above the pisally varying the ton 9, which causes the piston 9 to ascend so as to move up. ily the valve sleeve 8, and to progressively open. the inlet ports above referred to so as to progressively supply the needed quantity air, and likewise the additional quantity of fuel net-es iry to mix with said air to form the proper explosive mixture within the mixing chamber of feed pipe 5. /ihen there is a demand for an. increased volume of a mixture, as is the case when the throttle 7 is opened more, the greater vacuum within the carbureting chamber raises the piston S) and the sleeve 8 to exactly the desired extent to orovide said additional mixture. As the throttle 7 is closed and the vacuum within the pipe 6 is lessened, the piston S} descends, carrying down with it the viuvc sleeve 8, and correspondingly red ucing the amount oi? air and gas admitted. All changes in the position otthe sleeve 8 are effected without materiproporlion of fuel relatively to air, assuming, of course, the carburetor is properly adapted or adjusted to the par ticuiar engine with which it isassociated. in. the present instance, the aforesaid udjusting. means enables the expert to adjust the carburetor initially to any particular motor, after which the operation is wholly automatic and uniform throughout the full range of the apparatus.

It will be observed that all springs and sin'iilar appliances are eliminated, thereby rendering more certain, durahlehnd' positive the action of the apparatus as a whole, and furthermore reducing materially the danger of breakage. By reason of the construction it is a 'iparent that there is comparativcly no wear, since friction is practically elimimtted, the sleeve 8 sliding li htly u 011 the inner wall oi? the tube {5 and the plston 9 lilrcwise sliding lightly upon the wall. of the cylinder 10. it is obvious that by this arrangement the instrument is bound to operate gradually, by which i mean withoutv any undesirable abrupt fluctuation, since the piston i, b reason of being controlled by its own lixoil wright in. one direction and by a vacuum established through a comparatively small passage in the other direction, moves evenly and with only sullicient' speed to maintain an even and gradualopcaution, as distinguished from a quick abnormal operation.

1 have shown on the bottom oi the piston a detacnahle plate which may eonstitute a weight. While the piston itself nay be initially designed for any particular engine so that it will have the groper weight therefor in which event a separate plate such as 9 may be omitted, nevertheless it is apparenhthat the wei ht of the piston may be modified by providing such a plate and substituting heavier or ii hter plates as required, it itshould be esirable to adapt any particular carbureter of this design to an engine for which said carburetor was not originally planned. Any suitable means may be provided to cause said sleevelike throttle 8 to move u and down in such a manner as to keep tl ie openings therein in proper alincment with the fuel supply nozzles controlled thereby.

18 represents a screen or any suitable construction which may overstand and protool; the nozzles 5 and air admission openings. While the design of the carbureter is such that no ordinary amount of dust or dirt will produce any injurious efiect therein, nevertheless it is extremely desirable to prevent foreign matter from passing through the engine.

It will be observed that in operation the automatic throttle is in eflfect in free suspension, it being upheld by the tension of air in the carbureting chamber which remains substantially constant. Of course, as a greater volume of mixture is demanded and the throttle is opened to provide such increased volume, there will be a momentary tendency to increase the tension or vacuum which will lift the automatic throttle at. a higher level, but inasmuch as the raising off the throttle admits an increased volume or air, the said increased volume will be'found to be in such proportion as to supply a sutficient quantity of air to the carbureting chamber to preserve the initial air tension or vacuum, which, as above suggested, 1"- mains substantially constant irrespective of the volume of mixture being formed and transferred through the feed pipe.

Since the preferable construction'contcmplates the utilizing of the weight of the automatic throttle to counteract the lifting; tend-- ency of the vacuum, and since a weig it is a constant, it follows that there will the greatest accuracy in the operation of the instrument.

While the piston or dash pot e'ilcct above referred to prevents abnormally quick movement of the throttle when the apparatus is subjected to quickly varying loads,- it also is of decided advantage when the ap paratus used on automobiles traveling over prevent rotary displacement of the throttle as it rises and falls.

What I claim is:

1. In a carbu'reter, fuel reservoir, a tubular carbureting cham her-mounted therein and extending thereabove provided with a plurality of air a'dmission ports opening directly to the atmosphere, a pluralltyof fuel supply nozzles-an ranged concentrically about said chamber and placed with their open ends, respectively substantially at the centers of the atmospheric sides of said ports.

2. In a carburetor, an annular liquid fuel reservoir, a tubular carbureting chamber mounted therein and extending thereabove provided with a plurality of'alr admission ports opening directly to the atmosphere, a

plurality of fuel supply nozzles arranged concentrically about said chamber and placed with their open ends respectively substantially at the center of the atmospheric sides of said ports, and means for manually symmetrically varying the size of the ports.

3. In a carbureter, an annular liquid fuel reservoir', a tubular carbureting chamber concentrically about said mounted therein and extending thereabove provided with a plurality of alr admission ports opening direct to the atmosphere, a plurality of fuel supply nozzles arranged concentrically about said chamber, placed with their open ends respectively substantially at the center of theatmospherie' sides of said ports, and means for manually, symmetrically and simultaneously varying the size of the ports.

4:. In a carbure'ter, an annular liquid fuel reservoir, a tubular carbureting chamber mounted therein and extending thereabove provided with a plurality of air admission ports opening directly to the atmosphere, a plurality of fuel supply nozzles arranged chamber and placed with their open ends respectively substantially at the center of the atmospheric sides of said ports, means for manually symmetrically varying the size of said ports, and an automatic throttle for said ports within the carbureting chamber arranged to open and close the ports and also arranged to cut out one or more of the said fuel supply nozzles from or including the same in the draft through said port, and

means controllable by variation in pressure In the chamber for moving said throttle.

an annular liquid' 5. In a carbureter, an annular liquid fuel reservoir, a tubular carbureting chamber mounted therein and extending thereabove provided with a plurality of air admission ports opening directly to the atmosphere, a plurality. of fuel supply nozzles arranged concentrically about said chamber and placed with their open ends respectively substantially at the center of the atmospheric sides of said ports, means for manually symmetrically varying the size of the ports, an automatically controllable throttle adapted to open and close said ports progressively, a piston carried by said throttle, a concentric depending cylinder for said, piston, and a duct connecting the carbureting chamber with the space within said cylinder to produce therein a vacuum corresponding to the vacuum in the carbureting chamber for the purpose of moving the piston and controlling the position of said throttle.

6. In a carbureter, an annular liquid fuel reservoir, a tubular carbureting chamber mounted therein and extending thereabove provided with a plurality of air admission ports opening directly to the atmosphere, a plurality of fuel supply nozzles arranged concentrically about said chamber and placed with their open ends respectively substantially at the center of the atmospheric sides of the ports, means for manually symmetrically varying the slze of the ports, a concentric cylinder depending from said fuel reservoir, a slecvelike throttle movable up and down in said carbureting chamber having a plurality of passages adapted respectively to said air ports and arranged to progressively open and close the same as the throttle ascends and de. scends, said throttle extending into the depending cylinder, a piston carried by the bottom of the throttle, a duct-leading from said oarbureting chamber into said cylinder above the piston to permit of a vacuum therein corresponding to the vacuum 1n the carbureting chamber to move said piston and thereby said throttle in keeping with the variations in air tension within the carbureting chamber and thereby expose more or less of said air ports and fuel supply nozzles.

EUGENE A. RIOTTE. Witnesses L. S. JAMEs, E. E. Monsn. 

